More work on the Krytac Vector GRK (gearbox replacement kit). I've been a busy little bee...hmm, fun stuff probably hiding inside? but long way to go still...to lower costs I'll likely go with mounted switches and continue using my mini circuit boards for connectivity. Of course making this all work with off the shelf HPA engines, and make it easy to install will be the real trick. It takes ~12 hours to run a test print (to print both halves), then I make adjustments for fitment and function etc...rinse and repeat....